He later changed his discipline and became a private pupil of the Düsseldorf landscape and veduta painter Caspar Scheuren.
In 1904, Groll founded the November Group together with the painters Hans Deiker [de], Carl Haver [de], Carl Ernst Bernhard Jutz, Gustav Rutz, Emil Schultz-Riga and others in Düsseldorf.
[2][3] Groll was a member of the Verein der Düsseldorfer Künstler [de] and the Malkasten,[4] which he served as chairman for several years.
Besides Oswald Achenbach, Albert Flamm and others he belongs to the "Italian painters" of the Düsseldorf School.
[7] At an international art auction in 2013, Groll's Afternoon in Venice was sold for 58,750 euro.